diff --git a/lib/pdf_generator.ex b/lib/pdf_generator.ex
index 90de310..25b88ea 100644
--- a/lib/pdf_generator.ex
+++ b/lib/pdf_generator.ex
@@ -78,7 +78,7 @@ defmodule PdfGenerator do
   end
 
   # return file name of generated pdf
-  # requires: Porcelain, Misc.Random, zarex
+  # requires: Porcelain, Misc.Random
 
   @doc """
   Generates a pdf file from given html string. Returns a string containing a
@@ -158,7 +158,7 @@ defmodule PdfGenerator do
   end
 
   defp generate_filebase(nil), do: generate_filebase(Misc.Random.string)
-  defp generate_filebase(filename), do: Path.join(System.tmp_dir, Zarex.sanitize(filename))
+  defp generate_filebase(filename), do: Path.join(System.tmp_dir, filename)
 
   def encrypt_pdf( pdf_input_path, user_pw, owner_pw ) do
     pdftk_path = PdfGenerator.PathAgent.get.pdftk_path
diff --git a/mix.exs b/mix.exs
index 20f131f..3c33330 100644
--- a/mix.exs
+++ b/mix.exs
@@ -49,8 +49,6 @@ defmodule PdfGenerator.Mixfile do
         {:porcelain, "~> 2.0"},
         # a helper
         {:misc_random, ">=0.2.6" },
-        # filename sanitizer
-        {:zarex, "~> 0.2"},
         # generate docs
         {:earmark, "~> 0.1", only: :dev},
         {:ex_doc, "~> 0.7", only: :dev}